print("hello world")
#name=input()
#print("你好",name)
print(5//2)
h=input("请输入圆的周长：")
h=float(h)
r=h/2
p=3.14159
print("圆的周长为：{:.3f}".format(p*h))#保留3位小数
print("圆的面积为：{:.3f}".format(p*r*r))
a,b,c=88,77.5,99
num=a+b+c
print("语文成绩为：",a  ,"数学成绩为: ",b ,"英语成绩为: ",c)
print("总成绩为:",num)
line=input()
a,b,c=line.split(",")
a=float(a)
b=float(b)
c=float(c)
num=a+b+c
print("语文成绩为：",a  ,"数学成绩为: ",b ,"英语成绩为: ",c)
print("总成绩为:",num)
print("记得转化数字为对应类型")